Just watch the lore video about the horns and tablets that can gather fast amount of aether. While almost all of the horns and Tablets are gone, (although we have no idea if Tupsimati survived.) We have still have one Tablet left and that is currently in the depth of the ocean. It makes me wonder if we're going to see the horns and tablets again in the next expansion. I mean it would be fitting if Winterer want to survive the withering and they needed the tablets and horns to do it.